Smart Integration: Control your remotely with the Tuya Smart Life app or via for Alexa and for Home voice. Enhance your home automation with this 4-channel WiFi relay switch module Versatile Functionality: Supports multiple modes including inching, self-locking, interlocking. Customize device operation with simple app configuration and choose from a variety of wiring options for flexible setup RF Remote Control: Operate devices in your home with a 433MHz RF remote control. Note: Only compatible with 433MHz learning code remote controls Easy Installation: Comes with a DIN rail mount for easy integration into electrical panels. Comes with a detailed manual and wiring diagram for easy setup Energy management: Set up to 8 timer tasks for automatic operation, reduce energy use and improve convenience, support family sharing, share device control with family members Input voltage: AC 85-250V/USB 5V Max.Current:2000W/10A/gang Max.load:3500W/16A/4gang Wireless:Wi-Fi2.4ghz b/g+Bluetooth Frequency radio:433Mhz Working temperature:-20-70 App:Tuya & Smart life Colour:Black Material:plastic Package Contents: 1 x Smart Relay Switch 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.